Study on Electrical Properties of Carboxylated Bacterial Cellulose/Polypyrrole Composites

doi:10.19491/j.issn.1001-9278.2020.10.004

Abstract

Abstract:

In this research， bacterial cellulose was modified by carboxylate on the basis of its polyhydroxyl structure， and then the polypyrrole/carboxylated bacterial cellulose conductive composites were prepared by in-situ compounding with polypyrrole as a raw material and carboxylated bacterial cellulose as a template. The microstructure， chemical structure and thermal stability of the resulting composites were evaluated， and the effect of carboxylate degree on the electrical properties of the composites were investigated. The results indicated that the electronic conductivity of the composites increased with an increase of carboxylate degree， and it reached a maximum value of 10^-3 S/cm. The sample with a code of 0.04-48h achieved the optimum ionic conductivity.

Key words: bacterial cellulose, carboxylation, polypyrrole, electronic conductivity, alternating?current impedance

CLC Number:

TQ 324.8

YUE Lina, SUN Yingjuan, ZHU Taohua, GAO Fan, CHAI Zhiyong, ZHAO Ziwei, CHANG Ge. Study on Electrical Properties of Carboxylated Bacterial Cellulose/Polypyrrole Composites[J]. China Plastics, 2020, 34(10): 18-23.

Figures/Tables 6

Fig.1. Schematic diagram of BC to CA?BC

Fig. 2. FTIR spectra of PPy/CA?BC with different oxidant concentration

Fig.3. SEM images of PPy/CA?BC with different oxidant concentration

Fig. 4. Thermal decomposition of PPy/CA?BC with different oxidant concentration

Fig.5. Electronic conductivity of PPy/CA?BC with different oxidant concentration

Fig.6. AC impedance of PPy/CA?BC with different oxidant concentration

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